Best Answer:
The AirPods will be able to pair the old fashioned way via Bluetooth pairing to any Bluetooth 4.0 device, so as long as you have a device that's compatible with Bluetooth 4.0 stereo headphones, the AirPods will be able to work with it.

If you have an Apple device capable of pairing using the W1 chip, then that's great, but you don't *need* one of those devices to pair with the AirPods.

I am from Ecuador and I am going to travel to the United States in this month of September and I want to go to an APPLE store to check if there is availability of second hand equipment, iphones 6s, waiting for your prompt response, I wish you many successes In their work.

If you were to update your iPhone 6S for free to iOS 10 and above, all the AirPods features (such as the fancy pairing) will work. If you don't update, you can still pair your iPhone 6S with the AirPods, but the fancy new specific features of AirPods, will not work.